AD7623 reference buffer drive

On the AD7623, how much current can the internal reference/buffer supply to an external circuit? The data sheet has a schematic which indicates a 1 mA load on the 2.048 REF pin. No spec was listed on the data sheet for the reference buffer current drive.

The AD7623 datasheet states that the REFBUFIN output resistance is typically 6.33kohm when the internal reference is enabled. The internal reference could source tens of µA, but 10µA would be 63mV change in the reference. It's is not intended to drive any external circuit, it’s made to be over-driven when required.

The AD7623 datasheet states that the REFBUFIN output resistance is typically 6.33kohm when the internal reference is enabled. The internal reference could source tens of µA, but 10µA would be 63mV change in the reference. It's is not intended to drive any external circuit, it’s made to be over-driven when required.